Directional Terms Flashcards
Study of form and function, how a structure and its function become an integrated part of an interconnected design, and of how this design becomes a factor in the evolution of new forms, focuses on higher levels of biological organization-at the level of the organism, its parts, and its position within the ecological community.
morphology
applies to two or more features that share a common ancestry
homology
features with a similar function
analogy
can be traced back in time to the same feature in a common ancestor
homologous
similarity between successively repeated parts in the same organism
serial homology
features that simply look alike
homoplasy
way in which an animal’s body meets the surrounding environment
symmetry
body laid out equally from a central axis
radial symmetry
only mid-sagittal plane divides the two mirrored images, left and right.
bilateral symmetry
Head end or cranial in quadripeds; ventral end in bipeds
anterior
tail end or caudal in quadripes; dorsal end in bipeds
posterior
back
dorsal
front/belly
ventral
midline
medial
sides
lateral
